BPSoftware.com Blog

Wednesday, August 30, 2006

TShellExecuteInfo

In keeping with the posting of old sample snippets in my projects folder; ShellExecuteEx can be used to perform an action such as edit, print, open or properties display on a file. A ShellExecuteInfo structure is passed to the ShellExecuteEx function. A sample of how to display a file's properties dialog is as follows:

uses
ShellAPI;
procedure MyShellExecuteInfo(const filename: string; iVerb: integer);
var
sei: TShellExecuteInfo;
Buffer: array[0..MAX_PATH] of Char;
begin
FillChar(sei,sizeof(sei),0);
sei.cbSize:= sizeof(sei);
sei.lpFile:= PAnsiChar(filename);
// sei.lpDirectory and sei.lpIDList
Case iVerb of
0: sei.lpVerb:= 'properties';
1: sei.lpVerb:= 'open';
2: sei.lpVerb:= 'edit';
3: sei.lpVerb:= 'explore';
4: sei.lpVerb:= 'print';
end;
sei.fMask:= SEE_MASK_INVOKEIDLIST;
sei.nShow:= SW_SHOWNORMAL;
ShellExecuteEx(@sei);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
MyShellExecuteInfo(FileEdit1.Text,RadioGroup1.ItemIndex);
end;

Labels: Code, Delphi, WIN32

posted by Brad Prendergast at 6:43:00 AM (0 comments)
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Tuesday, August 29, 2006

That Special Folder

I am now on my second post with Windows Live Write, I think I'll stick with for a bit to see how it works out for me. As I was browsing through some of the code samples I put together for me to experiment (or whatever other reason I had for putting something together) I had come across this one for SHGetSpecialFolderPath. This may be a long post, but it is fairly straight forward.

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ShlObj, ShLwApi;

const
// Some redefined for readability
CSIDL_DESKTOP= $0000;
CSIDL_PROGRAMS= $0002;
CSIDL_CONTROLS= $0003;
CSIDL_PRINTERS= $0004;
CSIDL_FAVORITES= $0006;
CSIDL_STARTUP= $0007;
CSIDL_RECENT= $0008;
CSIDL_SENDTO= $0009;
CSIDL_DESKTOPDIRECTORY= $0010;
CSIDL_DRIVES= $0011;
CSIDL_NETHOOD= $0013;
CSIDL_FONTS= $0014;
CSIDL_COMMON_DOCUMENTS= $002E;
CSIDL_COMMON_FAVORITES= $001F;
CSIDL_BITBUCKET= $000A;
CSIDL_STARTMENU= $000B;
CSIDL_MYMUSIC= $000D;
CSIDL_COMMON_STARTMENU= $0016;
CSIDL_COMMON_PROGRAMS= $0017;
CSIDL_COMMON_STARTUP= $0018;
CSIDL_COMMON_DESKTOPDIRECTORY= $0019;
CSIDL_ALTSTARTUP= $0001D;
CSIDL_COMMON_ALTSTARTUP= $001E;
CSIDL_COOKIES= $0021;
CSIDL_HISTORY= $0022;
CSIDL_COMMON_TEMPLATES= $002D;
CSIDL_COMPUTERSNEARME= $003D;
CSIDL_CONNECTIONS= $0031;
CSIDL_PRINTHOOD= $001B;
CSIDL_TEMPLATES= $0015;
CSIDL_APPDATA= $0001A; //Version 4.71
CSIDL_INTERNET_CACHE= $0020; //Version 4.72
CSIDL_LOCAL_APPDATA= $001C; //Version 5.0
CSIDL_COMMON_ADMINTOOLS= $002F; //Version 5.0
CSIDL_ADMINTOOLS= $0030; //Version 5.0
CSIDL_COMMON_APPDATA= $0023; //Version 5.0
CSIDL_WINDOWS= $0024; //Version 5.0
CSIDL_SYSTEM= $0025; //Version 5.0
CSIDL_PROGRAM_FILES= $0026; //Version 5.0
CSIDL_MYPICTURES= $0027; //Version 5.0
CSIDL_PROFILE= $0028; //Version 5.0
CSIDL_PROGRAM_FILES_COMMON= $002B; //Version 5.0
CSIDL_MYVIDEO= $000E; //Version 6.0
CSIDL_PERSONAL= $0005; //Version 6.0
CSIDL_COMMON_MUSIC= $0035; //Version 6.0
CSIDL_COMMON_PICTURES= $0036; //Version 6.0
CSIDL_COMMON_VIDEO= $0037; //Version 6.0
CSIDL_CDBURN_AREA= $003B; //Version 6.0

type
TForm1 = class(TForm)
Edit1: TEdit;
Button1: TButton;
ListBox1: TListBox;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
Shlwapi_Ver: Real;
function Is471: Boolean;
function Is472: Boolean;
function Is5: Boolean;
function Is6: Boolean;
public
function GetDLLVersionInfo(FileName: string): real;
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
i: integer;
pathname: array[0..MAX_PATH] of Char;
begin
i:= Integer(ListBox1.ItemIndex);
if not SHGetSpecialFolderPath(Handle, pathname, i, False) then
pathname:= 'UNKNOWN';

Edit1.Text:= pathname;
Edit1.Hint:= Edit1.Text;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
Shlwapi_Ver:= GetDLLVersionInfo('Shlwapi.dll');
ListBox1.Items.AddObject('CSIDL_DESKTOP', TObject(CSIDL_DESKTOP));
ListBox1.Items.AddObject('CSIDL_PROGRAMS', TObject(CSIDL_PROGRAMS));
ListBox1.Items.AddObject('CSIDL_CONTROLS', TObject(CSIDL_CONTROLS));
ListBox1.Items.AddObject('CSIDL_PRINTERS', TObject(CSIDL_PRINTERS));
ListBox1.Items.AddObject('CSIDL_FAVORITES', TObject(CSIDL_FAVORITES));
ListBox1.Items.AddObject('CSIDL_STARTUP', TObject(CSIDL_STARTUP));
ListBox1.Items.AddObject('CSIDL_RECENT', TObject(CSIDL_RECENT));
ListBox1.Items.AddObject('CSIDL_SENDTO', TObject(CSIDL_SENDTO));
ListBox1.Items.AddObject('CSIDL_DESKTOPDIRECTORY', TObject(CSIDL_DESKTOPDIRECTORY));
ListBox1.Items.AddObject('CSIDL_DRIVES', TObject(CSIDL_DRIVES));
ListBox1.Items.AddObject('CSIDL_NETHOOD', TObject(CSIDL_NETHOOD));
ListBox1.Items.AddObject('CSIDL_FONTS', TObject(CSIDL_FONTS));
ListBox1.Items.AddObject('CSIDL_COMMON_DOCUMENTS', TObject(CSIDL_COMMON_DOCUMENTS));
ListBox1.Items.AddObject('CSIDL_COMMON_FAVORITES', TObject(CSIDL_COMMON_FAVORITES));
ListBox1.Items.AddObject('CSIDL_BITBUCKET', TObject(CSIDL_BITBUCKET));
ListBox1.Items.AddObject('CSIDL_STARTMENU', TObject(CSIDL_STARTMENU));
ListBox1.Items.AddObject('CSIDL_MYMUSIC', TObject(CSIDL_MYMUSIC));
ListBox1.Items.AddObject('CSIDL_COMMON_STARTMENU', TObject (CSIDL_COMMON_STARTMENU));
ListBox1.Items.AddObject('CSIDL_COMMON_PROGRAMS', TObject(CSIDL_COMMON_PROGRAMS));
ListBox1.Items.AddObject('CSIDL_COMMON_STARTUP', TObject(CSIDL_COMMON_STARTUP));
ListBox1.Items.AddObject('CSIDL_COMMON_DESKTOPDIRECTORY', TObject(CSIDL_COMMON_DESKTOPDIRECTORY));
ListBox1.Items.AddObject('CSIDL_ALTSTARTUP', TObject(CSIDL_ALTSTARTUP));
ListBox1.Items.AddObject('CSIDL_COMMON_ALTSTARTUP', TObject(CSIDL_COMMON_ALTSTARTUP));
ListBox1.Items.AddObject('CSIDL_COOKIES', TObject(CSIDL_COOKIES));
ListBox1.Items.AddObject('CSIDL_HISTORY', TObject(CSIDL_HISTORY));
ListBox1.Items.AddObject('CSIDL_COMMON_TEMPLATES', TObject(CSIDL_COMMON_TEMPLATES));
ListBox1.Items.AddObject('CSIDL_COMPUTERSNEARME', TObject(CSIDL_COMPUTERSNEARME));
ListBox1.Items.AddObject('CSIDL_CONNECTIONS', TObject(CSIDL_CONNECTIONS));
ListBox1.Items.AddObject('CSIDL_PRINTHOOD', TObject(CSIDL_PRINTHOOD));
ListBox1.Items.AddObject('CSIDL_TEMPLATES', TObject(CSIDL_TEMPLATES));
if Is471 then
ListBox1.Items.AddObject('CSIDL_APPDATA', TObject(CSIDL_APPDATA));
if Is472 then
ListBox1.Items.AddObject('CSIDL_INTERNET_CACHE', TObject(CSIDL_INTERNET_CACHE));
if Is5 then
begin
ListBox1.Items.AddObject('CSIDL_LOCAL_APPDATA', TObject (CSIDL_LOCAL_APPDATA));
ListBox1.Items.AddObject('CSIDL_COMMON_ADMINTOOLS', TObject(CSIDL_COMMON_ADMINTOOLS));
ListBox1.Items.AddObject('CSIDL_ADMINTOOLS', TObject(CSIDL_ADMINTOOLS));
ListBox1.Items.AddObject('CSIDL_COMMON_APPDATA', TObject (CSIDL_COMMON_APPDATA));
ListBox1.Items.AddObject('CSIDL_WINDOWS', TObject(CSIDL_WINDOWS));
ListBox1.Items.AddObject('CSIDL_SYSTEM', TObject(CSIDL_SYSTEM));
ListBox1.Items.AddObject('CSIDL_PROGRAM_FILES', TObject (CSIDL_PROGRAM_FILES));
ListBox1.Items.AddObject('CSIDL_MYPICTURES', TObject(CSIDL_MYPICTURES));
ListBox1.Items.AddObject('CSIDL_PROFILE', TObject(CSIDL_PROFILE));
ListBox1.Items.AddObject('CSIDL_PROGRAM_FILES_COMMON', TObject(CSIDL_PROGRAM_FILES_COMMON));
end;
if is6 then
begin
ListBox1.Items.AddObject('CSIDL_MYVIDEO', TObject(CSIDL_MYVIDEO));
ListBox1.Items.AddObject('CSIDL_PERSONAL', TObject(CSIDL_PERSONAL));
ListBox1.Items.AddObject('CSIDL_COMMON_MUSIC', TObject(CSIDL_COMMON_MUSIC));
ListBox1.Items.AddObject('CSIDL_COMMON_PICTURES', TObject(CSIDL_COMMON_PICTURES));
ListBox1.Items.AddObject('CSIDL_COMMON_VIDEO', TObject(CSIDL_COMMON_VIDEO));
ListBox1.Items.AddObject('CSIDL_CDBURN_AREA', TObject(CSIDL_CDBURN_AREA));
end;
end;

function TForm1.GetDLLVersionInfo(FileName: string): real;
var
dllhandle: THandle;
myDllGetVersion: DllGetVersionProc;
dvi: TDllVersionInfo;
hr: HRESULT;
begin
dllhandle:= LoadLibrary(PAnsiChar(FileName));
if (handle=0) then
RaiseLastOSError;
try
myDllGetVersion:= GetProcAddress(dllhandle,'DllGetVersion');
if Assigned(myDllGetVersion) then
begin
FillChar(dvi, SizeOf(dvi), 0);
dvi.cbSize := SizeOf(dvi);
hr:= myDllGetVersion(dvi);
if hr = NOERROR then
Result:= dvi.dwMajorVersion + (dvi.dwMinorVersion/100)
else
Result:= 0;
end;
finally
FreeLibrary(dllhandle);
end;
end;

function TForm1.Is471: Boolean;
begin
Result:= Shlwapi_Ver >= 4.71;
end;

function TForm1.Is472: Boolean;
begin
Result:= Shlwapi_Ver >= 4.72;
end;

function TForm1.Is5: Boolean;
begin
Result:= Shlwapi_Ver >= 5.0;
end;

function TForm1.Is6: Boolean;
begin
Result:= Shlwapi_Ver >= 6.0;
end;

end.

Labels: Code, Delphi, WIN32

posted by Brad Prendergast at 8:00:00 PM (1 comments)
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Monday, August 28, 2006

Live Writer Test

Well, I figured I'd give it a shot. After reading about it a bit I decided to see how Windows Live Writer worked for publishing this blog. This is my first (and only so far) post and the look and feel is pretty 'simple'. Let see how it does with pictures:

That seems pretty painless, how about some code:

procedure TForm1.acAboutExecute(Sender: TObject);
var
frmAbout: TAboutBox;
begin
frmAbout:= TAboutBox.Create(nil);
try
frmAbout.Image1.Picture.Graphic:= Application.Icon;
frmAbout.ProductName.Caption:= StrAppName;
frmAbout.Copyright.Caption:= Format (frmAbout.Copyright.Caption, [StrCopyright]);
frmAbout.Position:= poOwnerFormCenter;
frmAbout.ShowModal;
finally
FreeAndNil(frmAbout);
end;
end;

Now, we'll publish this and see how it looks.

Labels: Apps, Information, Tech

posted by Brad Prendergast at 8:00:00 PM (1 comments)
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Sunday, August 27, 2006

A RT_BITMAP told me so

As hinted to in a previous post, there are many resources (images) contained within standard files on your computer. There are a number of ways to access these resources. You could use a program such as AIconExtract to extract the resources or you could simply access and load the resources at runtime. I was messing around and wanted to browse the image resources of standard files on my computer. A lot of files contain sized image resources strung together. I quickly came up with an ImageList Display application. This sample loads a bitmap resource into a TImageList and allows for the scrolling through the images in the imagelist. Rather than get too verbose, I’ll let the code do the talking.

type
TForm2 = class(TForm)
FileEdit1: TFileEdit;
ImageList1: TImageList;
ListBox1: TListBox;
Image1: TImage;
SpinEdit1: TSpinEdit;
StaticText1: TStaticText;
procedure FileEdit1Change(Sender: TObject);
procedure ListBox1Click(Sender: TObject);
procedure SpinEdit1Change(Sender: TObject);
procedure ListBox1KeyPress(Sender: TObject; var Key: Char);
private
procedure ClearImage;
procedure ClearImageList;
public
procedure LoadBitmapNames(pFileName, pResType: PChar; Items: TStrings);
procedure AddResourceBitMaps(imagelist: TImageList; lpLibFileName: PChar;
const resname: string);
end;

var
Form2: TForm2;

implementation

resourcestring
StrUnableToOpen = 'Unable to open %s.';
StrDImagesInImage = '%d images in Imagelist.';
{$R *.dfm}

procedure TForm2.AddResourceBitMaps(imagelist: TImageList; lpLibFileName: PChar;
const resname: string);
var
handle: THandle;
bitmap: TBitMap;
MaskColor: TColor;
begin
handle := LoadLibrary(lpLibFileName);
if (handle=0) then
RaiseLastOSError;
bitmap:= TBitMap.Create;
try
bitmap.LoadFromResourceName(handle, resname);
imagelist.Height:= bitmap.Height;
imagelist.Width:= bitmap.Height;
MaskColor:= bitmap.Canvas.Pixels[0,bitmap.height-1];
imagelist.AddMasked(bitmap, MaskColor);
finally
bitmap.Free;
FreeLibrary(handle);
end;
end;

procedure TForm2.ClearImage;
begin
Image1.Picture.Graphic:= Nil;
end;

procedure TForm2.ClearImageList;
begin
ImageList1.Clear;
end;

procedure TForm2.FileEdit1Change(Sender: TObject);
begin
if Sender is TFileEdit then
begin
SpinEdit1.Value:= 0;
ClearImage;
LoadBitmapNames(PAnsiChar(TFileEdit(Sender).Text), RT_BITMAP,
ListBox1.Items);
end;
end;

procedure TForm2.ListBox1Click(Sender: TObject);
var
i: Integer;
begin
if Sender is TListBox then
begin
if TListBox(Sender).SelCount <> 0 then
begin
for i := 0 to TListBox(Sender).Count - 1 do
begin
if TListBox(Sender).Selected[i] then
begin
ClearImage;
ClearImageList;
AddResourceBitMaps(ImageList1, PAnsiChar(FileEdit1.Text), TListBox(Sender).Items[i]);
StaticText1.Caption:= Format(StrDImagesInImage, [ImageList1.Count]);
SpinEdit1.MaxValue:= ImageList1.Count - 1;
SpinEdit1.MinValue:= 0;
SpinEdit1.Value:= 0;
SpinEdit1Change(Sender);
end;
end;
end;
end;
end;

procedure TForm2.ListBox1KeyPress(Sender: TObject; var Key: Char);
begin
ListBox1Click(Sender);
end;

function EnumResNameProc(hMod: THandle; ResType, ResName: pchar;
Lines: TStrings): boolean; stdcall;
var
dw: dword;
begin
dw := dword(ResName);
if (hiword(dw) = 0) then
Lines.Add('#'+IntToStr(dw))
else
Lines.Add(ResName);
Result:= True;
end;

procedure TForm2.LoadBitmapNames(pFileName, pResType: PChar; Items: TStrings);
var
FileHandle: THandle;
begin
Items.Clear;
FileHandle:= LoadLibraryEx(pFilename,0,LOAD_LIBRARY_AS_DATAFILE);
try
if (FileHandle = INVALID_HANDLE_VALUE) then
raise EAccessViolation.Create(Format(StrUnableToOpen, [pFileName]));
if (filehandle > 0) then
EnumResourceNames(FileHandle,pResType,@EnumResNameProc,longint(Items))
else
Items.Clear;
finally
FreeLibrary(FileHandle);
end;
end;

procedure TForm2.SpinEdit1Change(Sender: TObject);
begin
ClearImage;
ImageList1.GetBitmap(SpinEdit1.Value,Image1.Picture.Bitmap);
end;

end.

For those that are interested in some trivial stuff, the source can be downloaded HERE.

Labels: Code, Delphi, WIN32

posted by Brad Prendergast at 6:18:00 PM (0 comments)
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Tray it a bit easier

There are a number of neat components available when installing Borland Development Studio. Unfortunately, there are not always a lot of demos readily available for a quick reference for basic use. As I was browsing through some outdated applications I came across one that minimized to the system tray. I also recalled there is now a TTrayIcon installed with a base BDS install. The TTrayIcon component makes it a lot easier (and cuts out quite a bit of code) to minimize your application icon to the system tray.

type
TForm1 = class(TForm)
TrayIcon1: TTrayIcon;
procedure TrayIcon1Click(Sender: TObject);
private
procedure WMSysCommand(var Msg: TWMSysCommand); message WM_SYSCOMMAND;
end;

procedure TForm1.TrayIcon1Click(Sender: TObject);
begin
SendMessage(handle, WM_SYSCOMMAND, SC_RESTORE, 0);
end;

procedure TForm1.WMSysCommand(var Msg: TWMSysCommand);
begin
case Msg.CmdType of
SC_MINIMIZE: begin
Visible:= False;
TrayIcon1.Visible:= True;
end;
SC_RESTORE: begin
Visible:= True;
TrayIcon1.Visible:= False;
end;
else
Inherited;
end;
end;

Labels: Code, Delphi, WIN32

posted by Brad Prendergast at 7:24:00 AM (0 comments)
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Saturday, August 26, 2006

Classic ASP and a Form

Forms are a common way to collect data on websites. A form can be made up of a number of controls; it is the input controls are used to collect user input. Once a user fills out a form there something is usually done with the data. I often save the information to a database. Instead of scripting out and insert statement you can easily pass ‘loop’ through each of the field values and build a statement. This would assume the field names in the database table match those of the input field names on the form.

<%
STR_SQL= "INSERT INTO data ("
STR_VALUES = "VALUES ('"
For each inputField in Request.Form
STR_SQL = STR_SQL & inputField & ", "
For each inputValue in Request.Form(inputField)
STR_VALUES = STR_VALUES & inputValue & "', '"
Next
Next

STR_SQL = STR_SQL & "REMOTE_ADDR, Date_Time) "
STR_VALUES = STR_VALUES & Request.ServerVariables("REMOTE_ADDR") & "', '" & Now() & "')"

STR_SQL= STR_SQL & STR_VALUES

‘DataConn is an existind data connection and post_RS is a recordset
Set post_RS = DataConn.Execute(STR_SQL)
%>

You could also list the information on the POST page:

<%
For each inputField in Request.Form
For each inputValue in Request.Form(inputField)
Response.write(inputField & “: “ & inputValue)
Next
Next
%>

Labels: ASP, Code

posted by Brad Prendergast at 6:25:00 PM (0 comments)
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Sunday, August 20, 2006

Ye Old TFileEdit

I am in the process of going through some old code snippets. I am updating a lot of things here and there. One thing that I have just made some changes to is the TFileEdit component that I've had available for a few years. I have made some changes to the property editor and classed the DialogOptions instead of having them as options that appear as part of the editor.

Labels: Components, Delphi

posted by Brad Prendergast at 10:36:00 AM (0 comments)
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